<!DOCTYPE html>

<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>导入外部样式</title>

        <style type="text/css">
            @import url( external.css );
        </style>

    </head>
    <body>

        <div class="wrapper">
            <div class="left"></div>
            <div class="center"></div>
            <div class="right"></div>
        </div>

    </body>
</html>